Exercise device



FIG. 1 is a front isometric view of a exercise device;

FIG. 2 is a rear isometric view of thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a rear plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken line disclosure in all views is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for an exercise device, as shown and described. 